1. People on the metro

Never approach anyone on the metro: You’ll look like a stalker. And never date anyone who approaches you. Do not stare. In fact, keep your eyes closed and your mouth shut.

2. People who remind you of your ex

This is one of the most important rules you can follow. Don’t get trapped. You and your ex broke up for a reason. History repeats itself. Never forget.

3. Exes of your best friend

If you want to ruin a friendship fast, date your best friend’s ex. However, if you like your friends, keep away!

4. Your relatives

Do you really need a reason why this is a bad idea?

5. Your boss

If you date your boss in order to climb the ladder of success, you are bound to be knocked down…or, even worse, knocked up! Never trouble trouble until the trouble troubles you. It only doubles trouble and troubles others too. Keep away from the boss…and his relatives.

6. Starving artists

"Oh, but he looks like Johnny Depp! And he’s a painter!" Yes, he also dropped out of school and has a slight problem with alcohol. They may be cute, thoughtful and sensitive, but they will only break your heart. They won’t love you, but only their art — which is cheap…and ugly.

7. Old expat men

OK, there are some exceptions to the rule. They may seem like a dream (in the dark) at first, but beware! These guys tend to be unreliable partners in the long run.

8. People who live long distances from you

Dating people long distance is a contradiction in terms. In order to date someone, you must be near him or her. Not that you need to keep your partner on a leash, but just remember that when the cat’s away, the mouse will play!

9. People from the Internet

Tall, dark and handsome? Oh no, don’t believe everything you read. That dreamboat is actually an albino midget. Never trust anyone on the Internet. You’ll only be disappointed.

10. Your ex

It might sound tempting when your ex crawls back to you on hands and knees and begs for your forgiveness, but control yourself! Exes don’t change. Open your horizons and try someone else!